Weirdproblem

[wEdgE90210]

Hi guys/girls, 

 

first excuse my bad english. 

 

I encountered a wierd problem. I helping a friend of mine build a pc. so far everything went smooth but i couldnt install win 10 from usb. i thought maybe i messed something up and went to mage a new one. here is where the problem starts. 

 

Because i got him a b450 board paired with a r3 3100 i brought me r7 1700 with me if updates where needed but it turned out biis was up to date. 

 

now i inserted my cpu back into my rig and nothing goes. no boot media found. 

 

i tried booting from the usb but it isnt recognized as bootable device. 

 

to clarify: 

 

My config has not changed, i basically just removed the cpu and put it back. no bend pins, nothing. 

 

also tried to set bios defaults, no change. all storage devices are recognized in bios. 

 

specs are:

 

Ryzen 7 1700

Asrock f4tality b350m mitx

16gb hyperx 3200mhz

crusial 250gb m.2 ssd (boot drive) 

samsung evo860 500gb ssd

western digital 2tb

gtx 1070ti

 

any suggestions what the problem might be?